I would say D, since A and B would be highly irrelevant. C sounds like a possible answer, but could still be viewed as irrelevant since it doesn't actually contain info about MP3 players.
Parenthetical citation and works cited.
Change killer’s to killers
I believe its the last one: 95% of the surface of Antarctica, which contains 70% of Earths freshwater supply, is covered by ice.
Answer:
1. forever
2. miles away
3. melted (this one not sure)
4 million
